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Re: linux kernel building for mips malta target board

To: sjhill@realitydiluted.com
Subject: Re: linux kernel building for mips malta target board
From: David Daney <ddaney@avtrex.com>
Date: Wed, 02 Nov 2005 16:45:40 -0800
Cc: crossgcc@sources.redhat.com, MIPS Linux List <linux-mips@linux-mips.org>
In-reply-to: <E1EXLJV-0005R4-K3@real.realitydiluted.com>
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sjhill@realitydiluted.com wrote:
I would like to build latest kernel (ie kernel 2.6.13) for mips malta
board. Can any one advise me the cross-compiler tools version to be used for building the linux kernel.


I use both gcc-3.3.1 and gcc-3.4.3 to build 2.6.x mips linux kernels. I think for the 2.6.13 kernel any of the latest released versions of 3.3.x, 3.4.x, or 4.0.x would work. Use the latest binutils (2.16.91 20050817 is what I am using).


Also, make sure to NOT use any of the 4.1 GCC stuff with Linux/MIPS
kernels. I am still tracking down errors with it.


Is this the problem you are seeing?:
In file included from include/linux/nfs_fs.h:15,
                 from init/do_mounts.c:12:
include/linux/pagemap.h: In function ‘fault_in_pages_readable’:
include/linux/pagemap.h:236: error: read-only variable ‘__gu_val’ used as ‘asm’ output include/linux/pagemap.h:236: error: read-only variable ‘__gu_val’ used as ‘asm’ output include/linux/pagemap.h:236: error: read-only variable ‘__gu_val’ used as ‘asm’ output include/linux/pagemap.h:236: error: read-only variable ‘__gu_val’ used as ‘asm’ output

The compiler behavior has changed since 4.0.1, but I think the new behavior is correct. I am blaming the __get_user macro in include/asm-mips/uaccess.h. It should be possible to fix it there. The alternative is to hack up include/linux/pagemap.h.

David Daney

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